Frame profile of the front sliding door of the draft device

Abstract

The present invention relates to a drafting device 1 comprising two side columns 61 and a front sliding door 70 connected to the side columns 61 so as to be vertically movable for opening and closing a drafting device working space 30. According to the present invention, the front sliding door 70 includes frames 82, 83, 84 on which at least one horizontally movable transverse sliding door 71 is arranged, the transverse sliding door defining a transverse sliding door access opening 71a to the drafting device working space 30 in the open position, and the frames 82, 83, 84 have at least partially convex surfaces 82a, 83a, 84a for indoor air inflows facing the transverse sliding door access opening 71a.

Claims

1. A laboratory fume hood (1) having two side columns (61) and a front sliding door (70) connected to the side columns (61) so as to be movable vertically for opening and closing a fume hood workspace (30), wherein the front sliding door (70) includes a frame (82, 83, 84) on which at least one horizontally movable lateral sliding door (71) is arranged, the lateral sliding door (71) defining a lateral sliding door access opening (71a) into the fume hood workspace (30) when in the open position, and the frame (82, 83, 84) has at least partially convex surfaces (82a, 83a, 84a) for indoor air inflows facing the lateral sliding door access opening (71a).

2. The draft device (1) according to claim 1, wherein the entire frame inlet surface (82a, 83a, 84a) is convex and faces the horizontal sliding door access opening (71a).

3. The draft device (1) according to claim 1 or claim 2, wherein the frame inlet surfaces (82a, 83a, 84a) are designed in an airfoil shape.

4. The draft apparatus (1) according to any one of claims 1 to 3, wherein the frame (82, 83, 84) includes an upper horizontally extending frame element (84) and a lower horizontally extending frame element (83) extending from one side column (61) to the other side column (61), and the inlet surfaces (84a, 83a) of the upper horizontally extending frame element (84) and the lower horizontally extending frame element (83) are designed in an airfoil shape.

5. The draft apparatus (1) according to any one of claims 1 to 4, wherein the frame (82, 83, 84) includes a first vertically extending frame element (82) and a second vertically extending frame element (82), and the inlet surfaces (82a) of the first vertically extending frame element (82) and the second vertically extending frame element (82) are designed in an airfoil shape.

6. The draft apparatus (1) according to claim 4 or 5, wherein the upper horizontally extending frame element (84) is joined to the first vertically extending frame element (82) and the second vertically extending frame element (82) by miter joints.

7. The draft apparatus (1) according to any one of claims 4 to 6, wherein the lower horizontally extending frame element (83) is joined to the first vertically extending frame element (82) and the second vertically extending frame element (82) by miter joints.

8. The horizontal sliding door (71) has a convex vertical edge (76) which has a horizontal sliding door edge inlet surface (85a) for indoor air, according to any one of claims 1 to 7, for use as a laboratory fume hood (1).

9. The draft device (1) according to claim 8, wherein the convex sliding door edge inlet surface (85a) is provided on a sliding door mounting element (85) attached to the vertical edge (76) of the sliding door (71).

10. The draft device (1) according to claim 8 or claim 9, wherein the horizontal cross-section of the convex sliding door edge inlet surface (85a) is crescent-shaped.

11. The draft device (1) according to any one of claims 8 to 10, wherein the horizontal cross-section of the convex sliding door inlet surface (85a) has an elliptical shape, and in particular encloses an arc in the range of 60° to 120°.

12. A laboratory fume hood (1) according to any one of claims 1 to 11, wherein a convex side column inlet surface (10a) for indoor air is formed on the front end surface of each side column (61).

13. A laboratory fume hood (1) according to claim 12, wherein a vertically oriented hollow profile (10) is arranged on the front end surface of each side column (61), and the vertically oriented hollow profile (10) has a convex side column inlet surface (10a).

14. The draft device (1) according to any one of claims 1 to 13, wherein a convex workbench inlet surface (20a) for indoor air is formed at the front edge of a workbench (34) that partitions the aforementioned work space (30) at the floor side.

15. A draft device (1) according to claim 14, wherein a horizontal hollow profile (20) is positioned on the front edge of the workbench (34), and the horizontal hollow profile (20) has a convex workbench inlet surface (20a).

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